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Abstract.With the rapid increase in the amount of information flowing across intranets and the Internet, security has become an essential part of today's computing world. With the emerging growth of embedded systems ranging from low-end systems such as PDAs, networked sensors and smart cards, to high-end systems such as routers, gateways, firewalls, and web servers, data availability service is now ubiquitously practical. This promise of universal connectivity for embedded systems creates increased possibilities for malicious users to gain unauthorized access to sensitive information. This paper presents a framework for HNS in which the embedded authorization credential scheme enables negotiation between entities to specify authorization requirements that must be met before accessing the network.